Merlin cars
There was a 6-wheeled job boasting a 'Merlin' at the Dunsfold field day/s, late 70's - early '80s. May be able to dig up some photo's.
It was red, and looked a bit like a Capri as someone mentioned ( possibly of another vehicle).
I think it did a high speed go on the runway, not sure after reading this if it was a Merlin or Meteor - having heard of the overheating problems with true Merlins in aircraft, one wonders...
The chap who built it also had a great deal of hassle from Rolls Royce ( it had a replica radiator to suit ) - the same thing happened to the full ( human ) size replica of Lady Penelope's ' FAB 1' of Thunderbirds fame.
Now at a museum in the Lake District - ' cars of the stars ' or similar - Rolls Royce tried to buy it just so they could crush it !!!
Considering RR cars section flog things like a mobilised brick, I reckon they could do with a sense of humour implant...